Assignee
DOWELL A DIVISION OF SCHLUMBER
US·28 granted patents·3,657 citations·filing 1992–1997
Top patents by PatentIndex Score
28 records- 0198US5828003AComposite coiled tubing apparatus and methodsDOWELL A DIVISION OF SCHLUMBER·Filed 1996·Granted Oct 27, 1998·207 cites·20 claims
- 0298US5501275AControl of particulate flowback in subterranean wellsDOWELL A DIVISION OF SCHLUMBER·Filed 1995·Granted Mar 26, 1996·576 cites·14 claims
- 0398US5439055AControl of particulate flowback in subterranean wellsDOWELL A DIVISION OF SCHLUMBER·Filed 1994·Granted Aug 8, 1995·473 cites·36 claims
- 0497US5518996AFluids for oilfield use having high-solids contentDOWELL A DIVISION OF SCHLUMBER·Filed 1995·Granted May 21, 1996·289 cites·13 claims
- 0596US5551516AHydraulic fracturing process and compositionsDOWELL A DIVISION OF SCHLUMBER·Filed 1995·Granted Sep 3, 1996·559 cites·6 claims
- 0692US5582250AOverbalanced perforating and fracturing process using low-density, neutrally buoyant proppantDOWELL A DIVISION OF SCHLUMBER·Filed 1995·Granted Dec 10, 1996·152 cites·9 claims
- 0791US5720598AMethod and a system for early detection of defects in multiplex positive displacement pumpsDOWELL A DIVISION OF SCHLUMBER·Filed 1995·Granted Feb 24, 1998·231 cites·64 claims
- 0890US5547027ALow temperature, low rheology synthetic cementDOWELL A DIVISION OF SCHLUMBER·Filed 1995·Granted Aug 20, 1996·76 cites·2 claims
- 0988US5573225AMeans for placing cable within coiled tubingDOWELL A DIVISION OF SCHLUMBER·Filed 1994·Granted Nov 12, 1996·103 cites·16 claims
- 1088US5551514ASand control without requiring a gravel pack screenDOWELL A DIVISION OF SCHLUMBER·Filed 1995·Granted Sep 3, 1996·132 cites·19 claims
- 1185US5613555AInflatable packer with wide slat reinforcementDOWELL A DIVISION OF SCHLUMBER·Filed 1994·Granted Mar 25, 1997·88 cites·13 claims
- 1284US5697441ASelective zonal isolation of oil wellsDOWELL A DIVISION OF SCHLUMBER·Filed 1994·Granted Dec 16, 1997·89 cites·10 claims
- 1382US5605195AInflation shape control system for inflatable packersDOWELL A DIVISION OF SCHLUMBER·Filed 1996·Granted Feb 25, 1997·103 cites·10 claims
- 1480US5507341AInflatable packer with bladder shape controlDOWELL A DIVISION OF SCHLUMBER·Filed 1994·Granted Apr 16, 1996·69 cites·13 claims
- 1580US5417291ADrilling connectorDOWELL A DIVISION OF SCHLUMBER·Filed 1993·Granted May 23, 1995·70 cites·17 claims
- 1679US5488989AWhipstock orientation method and systemDOWELL A DIVISION OF SCHLUMBER·Filed 1994·Granted Feb 6, 1996·81 cites·18 claims
- 1774US5846913AInvert biodegradable n-alkane(s) wellbore fluid containing less than 10 percent by weight of cycloparaffing isoparaffing and aromatic compounds, and method of drilling with such fluidDOWELL A DIVISION OF SCHLUMBER·Filed 1997·Granted Dec 8, 1998·46 cites·22 claims
- 1873US5557103AMethod of analyzing drilling fluidsDOWELL A DIVISION OF SCHLUMBER·Filed 1994·Granted Sep 17, 1996·38 cites·7 claims
- 1972US5503671AHigh temperature retarders for oil field cements, cement slurries and corresponding cementing processesDOWELL A DIVISION OF SCHLUMBER·Filed 1995·Granted Apr 2, 1996·49 cites·5 claims
- 2071US5929002AFluid loss controlDOWELL A DIVISION OF SCHLUMBER·Filed 1995·Granted Jul 27, 1999·37 cites·38 claims
- 2171US5821203AFoamed drilling fluids, their process for preparation and the corresponding drilling methodDOWELL A DIVISION OF SCHLUMBER·Filed 1995·Granted Oct 13, 1998·38 cites·32 claims
- 2263US5503672AHigh temperature retarders for oil field cements, cement slurries and corresponding cementing processesDOWELL A DIVISION OF SCHLUMBER·Filed 1994·Granted Apr 2, 1996·19 cites·7 claims
- 2363US5431219AForming casing window off whipstock set in cement plugDOWELL A DIVISION OF SCHLUMBER·Filed 1994·Granted Jul 11, 1995·43 cites·22 claims
- 2459US5962375AWellbore fluidsDOWELL A DIVISION OF SCHLUMBER·Filed 1995·Granted Oct 5, 1999·30 cites·23 claims
- 2558US5730222ADownhole activated circulating subDOWELL A DIVISION OF SCHLUMBER·Filed 1995·Granted Mar 24, 1998·46 cites·12 claims
- 2633US5685574ASnap latch seal locator for sealingly latching tubing to a packer in a wellboreDOWELL A DIVISION OF SCHLUMBER·Filed 1995·Granted Nov 11, 1997·4 cites·18 claims
- 2733US5660241APressure compensated weight on bit shock sub for a wellbore drilling toolDOWELL A DIVISION OF SCHLUMBER·Filed 1995·Granted Aug 26, 1997·8 cites·15 claims
- 2827US5547926ANew compositions for iron control in acid treatments for oil wellsDOWELL A DIVISION OF SCHLUMBER·Filed 1992·Granted Aug 20, 1996·1 cites·7 claims
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